This machine is the one I want to put 12GB in currently has ASUS P6X58D-E, i7 920 DO and 8GB GSKILL RipJaws 1333 which I will have to remove as its 4x2GB Sticks in Triple Channel setup.
Part Number : F3-10666CL7D-4GBRH ( I know this has to come out to make room for the other 6 sticks I want to put in)

The 3x2GB CORSAIR RAM I have to put in it is : CMX6GX3M3A1333C9 (then just curious which one of the systems above I could mix with it? Or should I really get the exact same stuff?